Nike has launched the largest ever LED installation in Africa with this piece lighting up Johannesburg with 90m high images of the worlds favourite football stars. Similar to the technical concept around the Nike Chalkbot, fans use the website, Twitter, Facebook, Mixt in South Africa and QQ in China to submit a 55 character headline for one of Nikes top 50 athletes from around the world. 100 headlines are chosen every night to be displayed, with the successful fans are sent a replica animation of what was projected in Johannesburg. You can submit a headline here.